9090540 has 36 divisors (see below), whose sum is σ = 27575184. Its totient is φ = 2424096.

The previous prime is 9090539. The next prime is 9090547. The reversal of 9090540 is 450909.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (9090547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25072 + ... + 25431.

Almost surely, 2^9090540 is an apocalyptic number.

9090540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9090540 is an abundant number, since it is smaller than the sum of its proper divisors (18484644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9090540 is a wasteful number, since it uses less digits than its factorization.

9090540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50518 (or 50513 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 9090540 is about 3015.0522383534. The cubic root of 9090540 is about 208.7035777108.

The spelling of 9090540 in words is "nine million, ninety thousand, five hundred forty".